Deck Building Cost in 2026: Wood vs. Composite

A new deck typically costs $4,000 to $18,000, with most homeowners spending $9,000 to $12,000 for a mid-sized build. The three biggest cost drivers are the square footage, the decking material (pressure-treated wood vs. composite), and the height and complexity — an elevated deck with stairs and railings costs far more than a ground-level platform.

Decks are priced per square foot, and the material you pick sets the tone for both the upfront bill and the decades of upkeep that follow. Here's the real math for 2026.

What a deck costs in 2026

Decks are priced per square foot, materials and labor combined. Here's the national range:

| Tier | Cost (installed) | Typical scenario | |---|---|---| | Low | $4,000 | Small ground-level pressure-treated deck (~200 sq ft) | | National average | $9,000–$12,000 | 300–400 sq ft mid-grade deck with railings | | High | $18,000+ | Large elevated composite deck with stairs, lighting |

Expect roughly $30 to $60 per sq ft installed, all in. Labor typically runs $15 to $35 of that — often half the total.

Cost by decking material

Material is the biggest single choice you'll make. Pressure-treated pine is cheapest upfront; composite costs more but skips the staining forever.

| Material | Installed per sq ft | 350 sq ft deck | Upkeep | |---|---|---|---| | Pressure-treated wood | $20–$35 | $7,000–$12,250 | Stain/seal every 2–3 yrs | | Cedar | $25–$40 | $8,750–$14,000 | Seal every 2–3 yrs | | Redwood | $30–$50 | $10,500–$17,500 | Seal periodically | | Composite (e.g. Trex-type) | $30–$60 | $10,500–$21,000 | Wash only | | PVC / capped polymer | $35–$65 | $12,250–$22,750 | Wash only |

Composite costs 20–40% more upfront but eliminates staining and sanding, and quality boards carry 25-year warranties. Over 15 years, the maintenance savings often close the gap.

Cost by size

Bigger decks cost more in total but often less per square foot, since setup and design are fixed costs.

| Deck size | Pressure-treated | Composite | |---|---|---| | Small (100–200 sq ft) | $3,000–$6,500 | $4,500–$11,000 | | Medium (300–400 sq ft) | $7,000–$13,000 | $10,000–$22,000 | | Large (500+ sq ft) | $11,000–$18,000 | $16,000–$30,000+ |

What drives the price

Beyond size and material, these push the number up or down:

• Height off the ground — an elevated deck needs taller footings, more framing, and stairs, adding 30–60%.
• Railings — required by code above 30 inches; $20–$60 per linear foot depending on material.
• Stairs — $100–$300 per step depending on width and material.
• Foundation and footings — soil, frost depth, and post count all matter.
• Permits and inspections — most decks require a permit; $50–$500 depending on jurisdiction.
• Add-ons — built-in benches, pergolas, lighting, and fascia wrap each add hundreds to thousands.
• Site access and grading — a sloped or hard-to-reach yard raises labor.

Is a deck worth it?

A well-built deck is one of the better outdoor ROI projects. Wood decks recoup a solid share of their cost at resale, and composite adds curb appeal with no upkeep hanging over the buyer. Just as important, a deck expands usable living space for a fraction of what an enclosed addition costs. If you're weighing outdoor projects, compare it against a new driveway for where your dollars go furthest.

Wood vs. composite: which should you choose?

This is the decision that shapes your whole budget, so it's worth thinking past the sticker price. Pressure-treated wood wins on upfront cost — it's 20–40% cheaper to install than composite — and if you enjoy the look of real wood and don't mind the upkeep, it's a fine choice. The catch is maintenance: staining or sealing every 2–3 years, occasional board replacement, and a shorter lifespan.

Composite and PVC cost more today but eliminate staining and sealing entirely, resist rot and insects, and carry 25-year (or longer) warranties. Over a 15-year horizon, the maintenance you skip often closes most of the price gap — and you get back the weekends you'd have spent sanding and sealing.

The rule of thumb: if you'll keep the home fewer than seven years or you're on a tight budget, pressure-treated wood makes sense. If you're staying put long-term or you hate yard maintenance, composite usually wins on total cost of ownership. Either way, use pressure-treated lumber for the framing underneath — there's no reason to pay for premium material where no one will ever see it.

Regional price differences

Deck costs track local labor rates and lumber prices, both of which vary a lot by region. Coastal and high-cost metros run well above the national average, while the Midwest and parts of the South come in below it.

| Region / metro | 350 sq ft PT wood deck | |---|---| | Midwest (Indianapolis, St. Louis) | $6,500–$10,500 | | Southeast (Atlanta, Nashville) | $7,000–$11,500 | | Southwest (Austin, Phoenix) | $7,000–$12,000 | | Northeast (Boston, New York suburbs) | $9,500–$15,000 | | West Coast (Portland, Bay Area) | $10,000–$17,000 |

Beyond labor, climate shapes the material choice. In wet or coastal regions, composite and capped polymer are popular because they resist rot and moisture — pushing the average up. In dry inland areas, pressure-treated wood holds up longer between seals, so more people choose the cheaper option.

Two costs surprise people: permit and engineering fees in strict jurisdictions (some require a stamped drawing for elevated decks) and footing depth in cold climates, where footings must extend below the frost line — sometimes four feet down — adding concrete and labor you won't see in a warm-climate quote. Ask your builder how local code affects your footings before you compare bids.

How to save money

• Get three itemized bids — deck pricing varies a lot by builder and season.
• Build in the off-season. Late fall and winter are slower for deck crews than spring.
• Choose pressure-treated framing under composite boards — you don't need premium material where it won't show.
• Keep the shape simple. Rectangles are cheaper than multi-level or angled designs.
• Stay ground-level if you can. Skipping tall footings, stairs, and long railing runs is the single biggest saver.
• Pull your own permit if your municipality allows it, and always vet your builder before signing.

A worked example

Say you want a 350 sq ft deck, three feet off the ground, with railings and a short flight of stairs. In pressure-treated wood at $28/sq ft, that's about $9,800, plus $1,000 for railings and stairs and a $200 permit — roughly $11,000. Build the same deck in composite at $45/sq ft and you're near $16,500 installed, but you'll never buy a can of stain. Over 15 years of skipped sealing, composite often pays back the difference.

FAQ

How long does it take to build a deck? A standard deck takes a crew 1–2 weeks, plus permit and inspection time. Large or elevated designs take longer.

Is composite really maintenance-free? Nearly. You'll wash it occasionally, but there's no staining, sealing, or sanding. It won't splinter or rot like wood can.

Do I need a permit to build a deck? Almost always, especially for anything attached to the house or above 30 inches. Skipping the permit can void insurance and complicate a home sale.

Wood or composite — which is the better value? Wood wins on upfront cost; composite wins on lifetime cost and convenience. If you'll keep the home 10+ years, composite usually pays off.

Can I build a deck myself? A simple ground-level platform is a realistic DIY for a skilled homeowner. Anything elevated, attached to the house, or requiring code-compliant footings and railings is safer with a pro.

A deck is a long-term investment in how you use your home — get the framing and footings right and the surface can be refreshed for decades. Price your build with the Repair Cost Estimator, and see the summer maintenance checklist to keep it in shape.

Cost figures are 2026 national averages for general information only, not quotes. Your price depends on your specific job, home, and location. Always get a written estimate before authorizing work.